G What is the physical meaning of the moment of inertia? The moment of inertia is the angular momentum of the object at a given instant in time. The moment of inertia is a measurement of how the radius of an object changes while it is rotating. The moment of inertia is a measurement of how much the object resists angular rotation. The moment of inertia is equivalent to the mass of the object.

The moment of inertia is a measurement of how much the object resists angular rotation.

Explanation:

Inertia is a property of object by which it tries to come in to rest when an external force is applied on the object. When the object is rotating then in that case the inertia acting on the  body , which tries to resist its motion is called moment of inertia.

Formula of moment of inertia I = m

This formula is valid for stationary object.

For rotating body moment of inertia is given by

Where I = Inertia of a rotating body

= rotation velocity of object

Thus for the rotating object, the moment of inertia is a measurement of how much the object resists angular rotation.